Since the founding of the People's Republic of China, brown corundum has been developing in China for more than 60 years. Now the brown corundum products produced in our country have reached the international advanced level. How did the early brown corundum develop in our country? Let's look at it together:
At the end of 1949, when Sichuan was liberated, Chinese technicians began to produce brown corundum in Leshan. At that time, brown corundum had some shortcomings such as poor grinding force and insufficient uniformity of granule size, which demanded to be improved continuously.
In 1952, the Southwest Company of China Industrial Equipment Company gave strong support to the brown corundum factory, which played an extremely important role in the development and production of brown corundum, capital turnover, expansion of sales and product reputation.
Then China entered the first Five-Year plan. With the continuous development of national industrial production, the demand for brown corundum increased sharply. Just at the beginning of 1956, the state carried out a comprehensive socialist transformation of private enterprises, changed production relations, liberated productive forces, greatly inspired workers'enthusiasm and creativity in production. The production of brown corundum has undergone tremendous changes and expanded production capacity. Several times, the annual output of brown corundum reaches 400 tons, but it still can not meet the needs of national industrial production and national defense construction.
After years of efforts, the annual output of brown corundum reached 1000 tons in 1972, basically meeting the needs of the national optical instrument industry, electronic industry, machinery industry, geological departments and scientific research units. Brown corundum has 28 varieties and specifications, and its quality has been significantly improved. Because the brown corundum produced at that time used natural ore as raw material, it has the characteristics of strong toughness, high uniformity and strong grinding ability, so that the polishing degree of grinding parts has been improved a lot, and it is very popular with customers. This means that the development of brown corundum abrasives has entered a mature stage.
At present, there are more than 200 brown corundum smelting enterprises in our country, with an annual production capacity of more than 2.2 million tons. More than 300 sand and fine powder production enterprises have annual production capacity of more than 2 million tons.